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Read the passage and answer the following questions.
A dry pellet of a common base B when kept in open absorbs moisture and turns sticky. The compound is also a by-product of the chlor-alkali process.
Identify B:
  • a)
    Sodium chloride
  • b)
    Sodium hydroxide
  • c)
    Carbon dioxide
  • d)
    Sodium carbonate
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Read the passage and answer the following questions.A dry pellet of a...
After absorption of moisture, the sodium hydroxide pellet becomes sticky. In the above process, sodium hydroxide is a byproduct.
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Read the passage and answer the following questions.A dry pellet of a...
Identification of the Common Base B

To identify the common base B mentioned in the passage, we need to consider the given information. Let's analyze the details provided to determine the correct answer.

1. Absorption of Moisture and Stickiness
The passage states that when the dry pellet of base B is kept in open, it absorbs moisture and turns sticky. This observation indicates that the base has a hygroscopic nature, meaning it has a tendency to absorb moisture from the air.

2. By-Product of the Chlor-Alkali Process
The passage also mentions that the compound is a by-product of the chlor-alkali process. The chlor-alkali process involves the electrolysis of a sodium chloride (NaCl) solution, which produces chlorine gas (Cl2), sodium hydroxide (NaOH), and hydrogen gas (H2). Therefore, the base B should be related to this process.

Analysis and Conclusion
Considering the given information, we can conclude that the compound B is most likely sodium hydroxide (NaOH). Here's the reasoning:

- Sodium hydroxide (NaOH) is a well-known base that is hygroscopic, meaning it readily absorbs moisture from the air. When exposed to the atmosphere, NaOH pellets or flakes tend to become sticky due to the absorption of water vapor.

- Sodium hydroxide is indeed a by-product of the chlor-alkali process. During the electrolysis of a sodium chloride solution, sodium hydroxide is produced at the cathode along with hydrogen gas.

Final Answer
Based on the given information, the common base B mentioned in the passage is sodium hydroxide (NaOH).
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Read the given passage and answer the question :A sample of water which gives lather with soap with difficulty is known as hard water, while a sample of water which gives lather with soap easily is known as soft water. Hardness of water is due to the presence of bicarbonates, sulphates and chlorides of calcium and magnesium. Hardness of water is of two types, temporary and permanent hardness. When hardness of water is due to the presence of bicarbonates of magnesium and calcium, it is called temporary hardness. When hardness of water is due to the presence of sulphates and chlorides of magnesium and calcium, it is called permanent hardness.The amount of hardness causing substances in a certain volume of water measures the extent of hardness or degree of hardness. Hardness of water is always calculated in terms of calcium carbonate although it is never responsible for causing hardness of water because of its insoluble nature. The reason for choosing calcium carbonate as the standard for calculating hardness of water is the ease in calculation as its molecular weight is exactly 100. Degree of hardness is usually expressed as parts per million (ppm).Q. Hardness of water is calculated in terms of

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Read the passage and answer the following questions.A dry pellet of a common base B when kept in open absorbs moisture and turns sticky. The compound is also a by-product of the chlor-alkali process.Identify B:a)Sodium chlorideb)Sodium hydroxidec)Carbon dioxided)Sodium carbonateCorrect answer is option 'B'. Can you explain this answer?
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